type Names = 'lrh' | 'yab' | 'xld'

let a: Names = 'lrh'

type Numbers = 18 | 28 | 38;

let age: Numbers = 18

// age = 'lrh' 

type zqzb = 18 | 'lrh' | 'men'

let age2: zqzb = 18